Siemens Building X
What it is
Siemens Building X is a cloud platform for managing building operations and using building data to support sustainability, operations, and performance. Its applications address energy and sustainability, safety and security, and operations and maintenance. Energy Manager monitors energy use and costs, benchmarks building portfolios, and offers custom performance indicators, analytics, and reporting. The platform connects through Siemens solutions, gateways, and standard protocols, and does not require Siemens devices. Open APIs support application development and system integration, including application, building, and user account data. Siemens hosts the service on AWS and performs deployment. Siemens states that building owners own their data and decide how it is accessed, shared, and used. Subscriptions are yearly; pricing, cancellation policies, and regional availability require contacting Siemens. Siemens lists ISO/IEC 27001, 27017, and 27018 certifications and a SOC 2 Type II report for Building X; Energy Manager is ISO 50001-certified.
Who it suits. Building X suits building owners and operators managing energy, safety, security, or maintenance across buildings. Its APIs and vendor-agnostic connectivity may also suit teams integrating building systems or developing applications.
Good
- Energy Manager monitors use and costs.
- Supports vendor-agnostic connectivity without requiring Siemens devices.
- Open APIs cover application, building, and user data.
- Building owners control access to their data.
Watch for
- Subscriptions are yearly.
- Pricing and regional availability require contacting Siemens.
- API Manager limits machine users per partition and group.
Verdict
Building X brings operational applications, building data, and APIs into a cloud platform. Customers should confirm pricing, regional availability, and cancellation terms with Siemens.
Plans and prices
| Plan | Price | Billed |
|---|---|---|
| Building X application or API subscription | — | Yearly; contact Siemens for pricing and cancellation terms |
From Siemens Building X's own pricing page, checked 15 Oct 2026. Every plan
What the maker publishes
- AI and forecasting
- The platform offers AI and machine-learning analytics for real-time analysis and forecasting. source
- API access limits
- Building X API Manager allows up to 200 machine users per partition and 75 per machine-user group. source
- API authentication
- Developers authenticate with client credentials and receive a JWT bearer token that typically expires after 24 hours. source
- API breaking change
- The Operations API moved to a new eu.buildingx.siemens.com endpoint in May 2026; the old endpoint is scheduled for retirement after 31 March 2027. source
- API change policy
- Siemens reserves the right to change behavior for security fixes and normally gives registered users at least three months’ deprecation notice. source
- API conventions
- Building X APIs follow JSON:API conventions with Siemens-specific filtering, pagination and error-handling guidance. source
- API Manager
- API Manager provides API documentation, OpenAPI Specification resources, machine-user authentication, authorization and secret rotation. source
- API sandbox
- A read-only sandbox is available immediately through the developer dashboard, but Fire, LifecycleTwin and Physical Security APIs are excluded from it. source
- Central dashboard
- Applications share a common dashboard and central data repository, allowing one login across applications. source
- Certifications
- Siemens lists ISO/IEC 27001, 27017, and 27018 and a SOC 2 Type II report for Building X, and says Energy Manager is ISO 50001-certified. source
- Cloud hosting
- Building X is based on AWS, and Siemens includes hosting and performs deployment. source
- Company database facts
- Crunchbase lists Siemens as a public post-IPO-equity company headquartered in Munich with more than 10,001 employees. source
- Company founded
- Siemens was founded in 1847. source
- Company legal name
- The maker is Siemens AG, a public company headquartered in Munich, Germany. source
- Company size
- LinkedIn lists Siemens as having more than 10,001 employees and around 318,000 worldwide employees as of 30 September 2025. source
- Compliance claims
- The product page lists ISO/IEC 27001, 27017 and 27018, a SOC 2 Type II report, UL Smart System Verified Platinum and ISO 50001 for Energy Manager. source
- Connectivity
- The platform supports vendor-agnostic connectivity using Siemens solutions, gateways, and standard protocols, and does not require Siemens devices. source
- Connectivity
- Building X is vendor-agnostic and can connect Siemens or third-party systems through gateways and standard protocols. source